Shop 4,483 Deals on Upper Receivers

Aero Precision Complete Upper Receiver M4E1-T .223 16in Wylde Fluted Barrel 15in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth

CMMG Dissent Mk3 .308 Winchester 20 inch Upper Receiver 1-10 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote/Hard Coat Anodized Sniper Grey

CMMG Dissent Mk3 .308 Winchester 20 inch Upper Receiver 1-10 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote/Hard Coat Anodized Armor Black

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in M4 Barrel 12in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth

CMMG Mk4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Coyote Tan

Spikes Tactical Upper 5.56 11.5in FN CHF w/12in BAR2 Rail

Spikes Tactical Upper 5.56 11.5in FN CHF w/BLK MOE Handguards & FSP

Spikes Tactical Upper 5.56 16in Midlength LE w/9in BAR2 Rail and FSP Black

Spikes Tactical Upper 5.56 16in Midlength LE w/10in SAR3 Rail

Spikes Tactical Upper 5.56 16in M4 LE w/7in M-LOK Rail & FSP

LANTAC USR Upper Receiver Forged

Dark Storm Industries DS-15 AR-15 5.56x45mm NATO 12.5 inch Upper Receiver SOCOM Profile Carbine Length 1-7 Twist Firestorm Compensator Magpul MVG

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X Crimson

Aero Precision M4E1-T Complete Upper Receiver 5.56mm 12.5in Carbine Length R-One M-LOK Handguard FDE

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider OD Green

Grid Defense Complete Upper Receiver 5.56mm 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Rail A2 Flash Hider Flat Dark Earth

Spikes Tactical Upper 5.56 16in Midlength LE w/MOE FDE SL Handguard

Maxim Defense Industries MDX 505 PDX/SCW Compatible URG Upper Receiver 5.56 NATO Hate Brake 1/2-28 Thread 5.5in Barrel Arid Earth

DEMO Daniel Defense M4A1 14.5 in Barrel 5.56mm NATO Upper Receiver Group

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps NiB-X Titanium Blue 1-NIBXURF-Titanium Blue

Spikes Tactical M4 Flat Top Upper W/Out Provision for Forward Assist or door

Spikes Tactical Upper 5.56 16in M4 LE w/MOE BLK SL Handguard

Aero Precision M4E1 Complete Upper Receiver 18in .223 Wylde Rifle Barrel EQ-15 HG Gen 2 Cerakote FDE

Bear Creek Arsenal BC-15 .450 Bushmaster 18in Upper Receiver Heavy Mid 1-24 Twist 5/8x32 Flash Hider Parkerized Tungsten